Faraday to L. Thompson   9 June 1849¹

R Institution | 9 June 1849

My dear Sir

Olifiant gas requires a pressure of 42 1/2 atmospheres to liquefy it at 30˚F. I have not succeeded in liquefying coal gas or light hydro-carbon but it requires a much higher pressure than that. Again Babbage I think bored a hole in a very compact limestone rock, poured in acid & closed it up hoping to confine the gas & blow up the rock but the gas gradually found its way through the body of the rock²[.]

Ever Truly Yours | M. Faraday

L. Thompson